Sunspot drawing of 2016-5-20

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https://doi.org/10.7891/e-manuscripta-159063



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2016-05-20
07:00
Hs 1304.6:10651
https://doi.org/10.7891/e-manuscripta-159063
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
103 1 3 J 21.9 296.1
104 15 16 H -7.8 222.5
105 4 4 B -18.2 254.1
3 20 23